Switchgear Bushings

What are switchgear bushings?

Switchgear bushings are electrical insulating components that provide a high-voltage electrical connection between switchgear equipment, such as circuit breakers or disconnect switches, and an external power transmission or distribution system. They are typically made of epoxy, porcelain or other composite materials and are designed to withstand high electrical and mechanical stresses.

The design and size of a switchgear bushing depends on specific application requirements and the type of switchgear equipment being used. They are rated based on their maximum operating voltage, which determines the amount of electrical stress they can withstand without breaking down or causing electrical arcing, as well as, the current carrying capacity, the maximum amount of current they can safely transmit without overheating.

Switchgear bushings are critical components of high-voltage switchgear systems, helping to ensure the safe and reliable operation of power transmission and distribution systems.

Polycast manufactures epoxy switchgear bushings, which have many advantages over porcelain switchgear bushings. Epoxy bushings are stronger, lighter, more durable, easier to install, and more flexible than porcelain and other materials. Epoxy is the main choice for power utilities, industrial plants, and renewable energy companies, as well as railways, data centers, and the oil and gas industry. If you have ever encountered downtime brought on by the field failure of a porcelain bushing, employing epoxy bushings could have reduced the expensive cost of that downtime.

Our high standards guarantee great quality, dependability, and safety, in compliance with the relevant industry standards, including CSA, IEC, NEMA, and IEEE.